Group DMs self delete after set timer

We all love Group DMs. Efficient ways to get a little group together without having to form a server. They are great! However when you make so many of them they kind of just flood your DMs section quite a lot. This is where the idea comes into play!

Similar to how archived stuff works, what if we could set a timer on said group DM where after a curtain amount of set time with NO ACTIVITY, the group simply deleted itself.

A bit of "out of sight out of mind" feature which is genuienly just nice to have around. Of course this should be optional so those who wish to keep their group DMs permanent can easily do so too!